add environment variable based customization section

Signed-off-by: Dweb Fan <dwebfan@gmail.com>

content.zh/docs/Installation/lomorage-service/installation-raspbian.md

@@ -139,18 +139,32 @@ sudo apt install lomo-base lomo-vips lomo-backend lomo-web lomo-frame -y
 echo "$USER ALL=(ALL:ALL) NOPASSWD: ALL" | sudo tee /etc/sudoers.d/$USER
 ```
 
-### 3. 按需修改加载目录
+### 3. 按需修改运行参数
+
+用户可以使用环境变量来修改某些运行参数。下面的例子使用`/etc/profile`作为系统缺省加载环境变量的文件，用户可以根据自己实际情况加以调整。
+
+请确保设置环境变量之后，启动lomod之前，这些环境变量已经在env里面定义了
+
+#### 3.1 修改磁盘mount目录
 
 如果您不是使用步骤4的usbmount来自动加载磁盘（没有加载到"/media"路径下的子目录），您需要添加Lomorage服务程序运行参数来指定加载目录。
 
-比如如果您使用PCManFM，那么加载的路径会是"/media/pi"。 要指定加载目录"/media/pi", 修改"/lib/systemd/system/lomod.service"的`ExecStart`字段，加上  "--mount-dir"参数:
+比如如果您使用PCManFM，那么加载的路径会是"/media/pi"。 要指定加载目录"/media/pi", 请添加环境变量`LOMOD_MOUNT_DIR=/media/pi`在`/etc/profile`，比如
 
-```bash
-ExecStart=/opt/lomorage/bin/lomod -b /opt/lomorage/var --mount-dir /media/pi  --max-upload 1 --max-fetch-preview 3
+```
+echo "export LOMOD_MOUNT_DIR=/media/pi" >> /etc/profile
 ```
 
 **请确保您的用户有上面设置的"mount-dir"的读写权限, 另外改参数必须是mount的父目录，比如mount到"/media/pi/disk0"下面，就必须指定为"/media/pi"**
 
+#### 3.2 HTTP 监听端口
+
+Lomod缺省监听端口是8000，如果需要自定义，清使用环境变量`LOMOD_PORT_HTTP`，比如
+
+```
+echo "export LOMOD_PORT_HTTP=8888" >> /etc/profile
+```
+
 ### 4. 运行
 
 重启Lomorage服务程序:
@@ -164,4 +178,4 @@ sudo systemctl restart lomow
 
 # 重启lomo-frame
 sudo service supervisor restart
-```
+```

content.zh/docs/Installation/lomorage-service/installation-ubuntu.md

@@ -61,17 +61,31 @@ sudo apt install lomo-base-lite lomo-vips lomo-backend lomo-web -y
 echo "$USER ALL=(ALL:ALL) NOPASSWD: ALL" | sudo tee /etc/sudoers.d/$USER
 ```
 
-## 3. 更加需要修改mount目录
+### 3. 按需修改运行参数
+
+用户可以使用环境变量来修改某些运行参数。下面的例子使用`/etc/profile`作为系统缺省加载环境变量的文件，用户可以根据自己实际情况加以调整。
+
+请确保设置环境变量之后，启动lomod之前，这些环境变量已经在env里面定义了
+
+#### 3.1 修改磁盘mount目录
 
 如果您不是使用步骤4的usbmount来自动加载磁盘（没有加载到"/media"路径下的子目录），您需要添加Lomorage服务程序运行参数来指定加载目录。
 
-比如如果加载的路径是"/media/hdd/disk0"。 要指定加载目录"/media/hdd", 修改"/lib/systemd/system/lomod.service"的`ExecStart`字段，加上  "--mount-dir"参数:
+比如如果您使用PCManFM，那么加载的路径会是"/media/pi"。 要指定加载目录"/media/pi", 请添加环境变量`LOMOD_MOUNT_DIR=/media/pi`在`/etc/profile`，比如
 
-```bash
-ExecStart=/opt/lomorage/bin/lomod -b /opt/lomorage/var --mount-dir /media/hdd  --max-upload 1 --max-fetch-preview 3
 ```
+echo "export LOMOD_MOUNT_DIR=/media/pi" >> /etc/profile
+```
+
+**请确保您的用户有上面设置的"mount-dir"的读写权限, 另外改参数必须是mount的父目录，比如mount到"/media/pi/disk0"下面，就必须指定为"/media/pi"**
 
-**请确保您的用户有上面设置的"mount-dir"的读写权限, 另外改参数必须是mount的父目录，比如mount到"/media/hdd/disk0"下面，就必须指定为"/media/hdd"**
+#### 3.2 HTTP 监听端口
+
+Lomod缺省监听端口是8000，如果需要自定义，清使用环境变量`LOMOD_PORT_HTTP`，比如
+
+```
+echo "export LOMOD_PORT_HTTP=8888" >> /etc/profile
+```
 
 ## 4. 运行
 
@@ -86,4 +100,4 @@ sudo systemctl restart lomow
 
 # 重启lomo-frame
 sudo service supervisor restart
-```
+```

content/docs/Installation/lomorage-service/installation-raspbian.md

@@ -139,17 +139,33 @@ Make sure the user can sudo without password, if not, execute the following comm
 echo "$USER ALL=(ALL:ALL) NOPASSWD: ALL" | sudo tee /etc/sudoers.d/$USER
 ```
 
-### 3. Change mount directory and username if needed
+### 3. Configuration parameter customization
+
+User can use environment variable to control configuration parameter as below. Above example is using `/etc/profile` file as default. You can change based on your own setup.
+
+Note after you set environment variable, please make sure it takes effect when you start or restart lomod
+
+#### 3.1 Change mount directory
 
 You may need to specify the mount directory if the USB drive is not mounted in "/media" directory. 
 
-For example if you are using PCManFM, then the mount directory will be "/media/pi". To specify the mount directory to be "/media/pi", modify `ExecStart` in "/lib/systemd/system/lomod.service", and add parameter "--mount-dir" as below, **this parameter should be the directory mount, not the sub-directory**
+For example if you are using PCManFM, then the mount directory will be "/media/pi". To specify the mount directory to be "/media/pi", add environment variable `LOMOD_MOUNT_DIR=/media/pi` in `/etc/profile`, such as 
 
-```bash
-ExecStart=/opt/lomorage/bin/lomod -b /opt/lomorage/var --mount-dir /media/pi  --max-upload 1 --max-fetch-preview 3
 ```
+echo "export LOMOD_MOUNT_DIR=/media/pi" >> /etc/profile
+```
+
+**this parameter should be the directory mount, not the sub-directory**
 
-**Make sure the user has the r/w permission for the "mount-dir" set above, this parameter should be the parent directory mounted, for example if it's mounted as "/media/pi/disk0", then you should use "/media/pi/".**
+**Make sure the user has the r/w permission for above mount directory, this parameter should be the parent directory mounted, for example if it's mounted as "/media/pi/disk0", then you should use "/media/pi/".**
+
+#### 3.2 HTTP Listen Port
+
+Lomod listens on port 8000 by default. If it is conflict and you want to specify own listen port, you can add environment variable `LOMOD_PORT_HTTP` in `/etc/profile`. For example, 
+
+```
+echo "export LOMOD_PORT_HTTP=8888" >> /etc/profile
+```
 
 ### 4. Run
 

content/docs/Installation/lomorage-service/installation-ubuntu.md

@@ -61,17 +61,33 @@ Make sure the user can sudo without password, if not, execute the following comm
 echo "$USER ALL=(ALL:ALL) NOPASSWD: ALL" | sudo tee /etc/sudoers.d/$USER
 ```
 
-## 3. Change mount directory
+### 3. Configuration parameter customization
+
+User can use environment variable to control configuration parameter as below. Above example is using `/etc/profile` file as default. You can change based on your own setup.
+
+Note after you set environment variable, please make sure it takes effect when you start or restart lomod
+
+#### 3.1 Change mount directory
 
 You may need to specify the mount directory if the USB drive is not mounted in "/media" directory. 
 
-For example if the mount directory is "/media/hdd/disk0", you need to specify the mount directory to be "/media/hdd", modify `ExecStart` in "/lib/systemd/system/lomod.service", and add parameter "--mount-dir" as below, **this parameter should be the directory mount, not the sub-directory**
+For example if you are using PCManFM, then the mount directory will be "/media/pi". To specify the mount directory to be "/media/pi", add environment variable `LOMOD_MOUNT_DIR=/media/pi` in `/etc/profile`, such as 
 
-```bash
-ExecStart=/opt/lomorage/bin/lomod -b /opt/lomorage/var --mount-dir /media/hdd  --max-upload 1 --max-fetch-preview 3
 ```
+echo "export LOMOD_MOUNT_DIR=/media/pi" >> /etc/profile
+```
+
+**this parameter should be the directory mount, not the sub-directory**
 
-**Make sure the user has the r/w permission for the "mount-dir" set above, this parameter should be the parent directory mounted, for example if it's mounted as "/media/hdd/disk0", then you should use "/media/hdd/".**
+**Make sure the user has the r/w permission for above mount directory, this parameter should be the parent directory mounted, for example if it's mounted as "/media/pi/disk0", then you should use "/media/pi/".**
+
+#### 3.2 HTTP Listen Port
+
+Lomod listens on port 8000 by default. If it is conflict and you want to specify own listen port, you can add environment variable `LOMOD_PORT_HTTP` in `/etc/profile`. For example, 
+
+```
+echo "export LOMOD_PORT_HTTP=8888" >> /etc/profile
+```
 
 ## 4. Run
 
@@ -86,4 +102,4 @@ sudo systemctl restart lomow
 
 # restart lomo-frame
 sudo service supervisor restart
-```
+```