some more tweaks and fixes

Dockerfile

@@ -0,0 +1,31 @@
+############################
+# STEP 1 build executable binary
+############################
+FROM golang:alpine AS builder
+# Install git.
+# Git is required for fetching the dependencies.
+RUN apk update && \
+    apk add --no-cache ca-certificates pkgconf git libxml2-dev oniguruma-dev && \
+    apk add --virtual build-dependencies build-base gcc wget git && \
+    mkdir -p /opt/build
+WORKDIR /opt/build
+COPY . .
+# Fetch dependencies.
+# Using go get.
+RUN go get -d -v
+# Build the binary.
+RUN go build -o /go/bin/fbBot .
+############################
+# STEP 2 build a small image
+############################
+FROM alpine
+VOLUME /opt/tmp
+RUN apk update && \
+    apk add --no-cache ca-certificates chromium chromium-chromedriver
+# Copy our static executable.
+COPY --from=builder /go/bin/fbBot /opt/fbBot
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt 
+COPY contrib/ /
+COPY config.yaml /etc/fbBot/config.yaml
+# Run the hello binary.
+ENTRYPOINT ["/opt/fbBot"]