Added feature for subfolder hosting

By setting the SUBFOLDER env var, you can host Homer in a subfolder behind a reverse proxy.

2 files changed, 10 insertions, 0 deletions

diff --git a/README.md b/README.md
index 5ea80fb..57185a7 100644
--- a/README.md
+++ b/README.md
@@ -83,6 +83,10 @@ docker run -d \
 
 Default assets will be automatically installed in the `/www/assets` directory. Use `UID` and/or `GID` env var to change the assets owner (`docker run -e "UID=1000" -e "GID=1000" [...]`).
 
+## Host in subfolder
+
+If you would like to host Homer in a subfolder, for e.g. behind a reverse proxy, supply the name of subfolder by using the `SUBFOLDER` env var.
+
 ### Using docker-compose
 
 The `docker-compose.yml` file must be edited to match your needs.
diff --git a/entrypoint.sh b/entrypoint.sh
index f1a8c22..9da2615 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -11,5 +11,11 @@ fi
 # Install default config if no one is available.
 yes n | cp -i /www/default-assets/config.yml.dist /www/assets/config.yml &> /dev/null
 
+# Create symbolic link for hosting in subfolder.
+if [[ -n "${SUBFOLDER}" ]]; then
+  ln -s /www "/www/$SUBFOLDER"
+  chown -h $USER:$GROUP "/www/$SUBFOLDER"
+fi
+
 chown -R $UID:$GID /www/assets
 exec su-exec $UID:$GID darkhttpd /www/ --no-listing --port "$PORT"