Add abillity for ui to be served from a subpath (#24)

Add env variable for ui served from a subpath

Dockerfile

@@ -4,6 +4,9 @@ FROM node:10 as ui
 ARG API_ENDPOINT
 ENV API_ENDPOINT=${API_ENDPOINT}
 
+ARG UI_PUBLIC_URL
+ENV UI_PUBLIC_URL=${UI_PUBLIC_URL}
+
 RUN mkdir -p /app
 WORKDIR /app
 
@@ -11,7 +14,7 @@ COPY ui/package*.json /app/
 RUN npm install
 COPY ui /app
 
-RUN npm run build
+RUN npm run build -- --public-url $UI_PUBLIC_URL
 
 # Build API
 FROM golang:alpine AS api

docker-compose.example.yml

@@ -16,6 +16,10 @@ services:
     build:
       context: "."
       args:
+        - UI_PUBLIC_URL=/
+
+        # Change This: The url from which the web ui can access the backend
+        # Should by default be the value of PUBLIC_ENDPOINT with /api appended to it
         - API_ENDPOINT=http://localhost:8000/api/
 
     restart: always
@@ -31,7 +35,7 @@ services:
       - PHOTO_CACHE=/app/cache
       - SERVE_UI=1
 
-      # Change This: The publicly exposed url for the api
+      # Change This: The publicly exposed url
       # For example if the server is available from the domain example.com,
       # change this value to http://example.com/
       - PUBLIC_ENDPOINT=http://localhost:8000/