Merge pull request #5 from mietzen/patch-1

Added install hint for systems without AVX support

content/2.installation/1.docker.md

@@ -87,3 +87,25 @@ services:
 networks:
   viewtube:
 ```
+
+#### Running on systems without AVX support, e.g. Synology NAS
+
+When running on a home NAS system, e.g. Synlogy, QNAP, ASUSTOR, etc., you may encounter the following warning:
+
+```Shell
+viewtube-mongodb    | WARNING: MongoDB 5.0+ requires a CPU with AVX support, and your current system does not appear to have that!
+viewtube-mongodb    |   see https://jira.mongodb.org/browse/SERVER-54407
+viewtube-mongodb    |   see also https://www.mongodb.com/community/forums/t/mongodb-5-0-cpu-intel-g4650-compatibility/116610/2
+viewtube-mongodb    |   see also https://github.com/docker-library/mongo/issues/485#issuecomment-891991814
+```
+
+If so you may use `mongo:4.2` instead of `mongo:5`:
+
+```yaml
+...
+  viewtube-mongodb:
+    restart: unless-stopped
+    image: mongo:4.2
+...
+```
+