Fix Dockerfile only and forget about Travis CI

Dockerfile

@@ -1,26 +1,36 @@
-FROM node:8 AS builder
+FROM node:8.15.1 AS builder
 
-RUN curl -sL https://install.meteor.com | sed s/--progress-bar/-sL/g | /bin/sh
-RUN mkdir /src /bundle
-RUN chown -R node /src /bundle
+ENV BUNDLE_DIR /home/node/bundle
+ENV SRC_DIR /home/node/src
+ENV TMP_DIR /home/node/tmp
 
 USER node:node
 
-WORKDIR /src
-COPY --chown=node:node . .
+RUN mkdir -p $SRC_DIR $BUNDLE_DIR $TMP_DIR
+COPY --chown=node:node . $SRC_DIR
 
-RUN meteor npm install
-RUN meteor build --architecture os.linux.x86_64 --directory /bundle
-RUN cd /bundle/bundle/programs/server && npm install
+RUN curl -o $TMP_DIR/meteor.sh 'https://install.meteor.com?release=1.8.1'; sh $TMP_DIR/meteor.sh
 
-FROM node:8-slim
+ENV PATH="/home/node/.meteor:${PATH}"
+WORKDIR $SRC_DIR
+RUN npm i
+RUN meteor npm install --production
+RUN meteor build --server-only --directory $BUNDLE_DIR
+RUN cd ${BUNDLE_DIR}/bundle/programs/server && npm install
+
+FROM node:8.15.1-slim
+
+ENV APP_DIR /home/node/app
+ENV BUNDLE_DIR /home/node/bundle
 
 USER node:node
 
-COPY --from=builder /bundle /app
-WORKDIR /app/bundle
+COPY --from=builder $BUNDLE_DIR $APP_DIR
+WORKDIR $APP_DIR/bundle
+
 
 ENV PORT 3000
 EXPOSE 3000
 
+
 CMD ["node", "./main.js"]