Changed routing framework from mux to Gin.

Swagger doc is now included in the application.
A fronted can now be hosted from the application.

Dockerfile

@@ -1,13 +1,32 @@
+FROM node:lts-alpine as build_vue
+
+# make the 'app' folder the current working directory
+WORKDIR /app
+
+# copy both 'package.json' and 'package-lock.json' (if available)
+COPY cmd/frontend/package*.json ./
+
+# install project dependencies
+RUN npm install
+
+COPY cmd/frontend .
+
+RUN npm run build
+
 FROM golang:1.16-alpine as build_go
 
 COPY go.* /music-server/
-COPY ./cmd /music-server/cmd/
+COPY ./cmd/*.go /music-server/cmd/
+COPY ./cmd/swagger /music-server/cmd/swagger
 COPY ./pkg /music-server/pkg/
 
 WORKDIR /music-server/
 RUN go mod download
 
-WORKDIR /music-server/cmd/backend
+WORKDIR /music-server/cmd
+
+COPY --from=build_vue /app/dist ./frontend/dist
+
 RUN go build -o /music-server/MusicServer
 
 # Stage 2, distribution container