Add API URL injection back and Docker builds.

Dockerfile

@@ -0,0 +1,20 @@
+FROM node:15-buster AS builder
+
+WORKDIR /usr/src/app
+COPY package*.json ./
+
+RUN yarn --no-cache
+
+COPY . .
+COPY .env.build .env
+RUN yarn typecheck
+RUN yarn build
+RUN npm prune --production
+
+FROM node:15-buster
+WORKDIR /usr/src/app
+COPY --from=builder /usr/src/app .
+RUN rm ./.env
+
+EXPOSE 5000
+CMD [ "yarn", "start:inject" ]