build: setup Docker dev configuration

- Add `.dockerignore` file
- Add `Dockerfile.dev`
- Modify `docker-compose.yml`:
  - Add `restart: on-failure` to `app` service
  - Modify `build` section of `app` service
  - Remove `links` section from `app` service
  - Add `networks` section to `app` and `db` services
  - Add `networks` section to the end of the file

Signed-off-by: wancat <wancat@wancat.cc>

Dockerfile.dev

@@ -0,0 +1,15 @@
+FROM node
+
+WORKDIR /app
+COPY package.json yarn.lock ./
+COPY server/package.json ./server/
+RUN yarn install --frozen-lockfile
+
+WORKDIR /app/server
+
+ENV NODE_ENV=development
+ENV HOST=0.0.0.0
+ENV PORT=3000
+EXPOSE 3000
+
+CMD [ "yarn", "dev" ]