got a build working!

.dockerignore

@@ -0,0 +1,25 @@
+**/.classpath
+**/.dockerignore
+**/.env
+**/.git
+**/.gitignore
+**/.project
+**/.settings
+**/.toolstarget
+**/.vs
+**/.vscode
+**/*.*proj.user
+**/*.dbmdl
+**/*.jfm
+**/bin
+**/charts
+**/docker-compose*
+**/compose*
+**/Dockerfile*
+**/node_modules
+**/npm-debug.log
+**/obj
+**/secrets.dev.yaml
+**/values.dev.yaml
+LICENSE
+README.md

.gitignore

@@ -0,0 +1 @@
+images/

Dockerfile

@@ -6,7 +6,10 @@ RUN apt-get clean && apt-get update && \
     apt-get install -y \
     build-essential gawk luajit flex git gettext \
     python3-distutils rsync unzip wget nano file \
-    libncurses5-dev libssl-dev zlib1g-dev
+    libssl-dev zlib1g-dev curl \
+    gcc-multilib libncurses-dev libncursesw-dev \
+    xsltproc python3
+
 
 RUN mkdir -p /root/.ssh
 RUN chmod 644 /root/.ssh
@@ -20,9 +23,13 @@ WORKDIR /build
 
 # Clone OpenWRT.
 USER build
-RUN git clone https://git.openwrt.org/openwrt/openwrt.git
+RUN git clone --branch openwrt-22.03 https://git.openwrt.org/openwrt/openwrt.git
 WORKDIR /build/openwrt
 
+# Download and apply the patch for the fan controller
+RUN curl -0 /build/openwrt/emc2301-openwrt.patch https://gist.githubusercontent.com/shayne/bc9f3778b53134d3274f9794eba4f874/raw/9b455e2ef262b729800ea8009e8a774966110c6c/emc2301-openwrt.patch
+# RUN cd /build/openwrt/ && git apply ./emc2301-openwrt.patch 
+
 # Update the feeds.
 RUN ./scripts/feeds update -a
 RUN ./scripts/feeds install -a