build: Update runtime.Dockerfile to specify python version.

docker/runtime.Dockerfile

@@ -23,7 +23,7 @@ FROM node:${docker_node_image_version} as runtime-builder
 
 ADD ./ /service
 WORKDIR /service
-RUN apk --no-cache add --virtual native-deps g++ gcc libgcc libstdc++ linux-headers make python \
+RUN apk --no-cache add --virtual native-deps g++ gcc libgcc libstdc++ linux-headers make python2 \
     && npm install --quiet node-gyp -g \
     && npm install --quiet \
     && npm run build \
@@ -39,7 +39,7 @@ FROM node:${docker_node_image_version} as release
 COPY --from=runtime-builder /service/artifact /seistore-service
 WORKDIR /seistore-service
 
-RUN apk --no-cache add --virtual native-deps g++ gcc libgcc libstdc++ linux-headers make python \
+RUN apk --no-cache add --virtual native-deps g++ gcc libgcc libstdc++ linux-headers make python2 \
     && addgroup appgroup \
     && adduser --disabled-password --gecos --shell appuser --ingroup appgroup \
     && chown -R appuser:appgroup /seistore-service \
@@ -48,4 +48,4 @@ RUN apk --no-cache add --virtual native-deps g++ gcc libgcc libstdc++ linux-head
     && npm install --production --quiet \
     && apk del native-deps    
 
-ENTRYPOINT ["node", "./dist/server/server-start.js"]
+ENTRYPOINT ["node", "./dist/server/server-start.js"]
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