prep for 18.04

docker/heralding/Dockerfile

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+FROM alpine
+  
+# Include dist
+ADD dist/ /root/dist/
+
+# Install packages
+RUN apk -U upgrade && \
+    apk add bash \
+            build-base \
+            git \
+            libcap \
+            libffi-dev \
+            libressl-dev \
+            postgresql-dev \
+            python3 \
+            python3-dev \
+            py-virtualenv && \
+    pip3 install --upgrade pip && \
+
+# Setup heralding
+    mkdir -p /opt && \
+    cd /opt/ && \
+    git clone https://github.com/johnnykv/heralding && \
+    cd heralding && \
+    mv /root/dist/heralding.yml /opt/heralding/ && \
+    pip3 install -r requirements.txt && \
+    pip3 install heralding && \
+
+# Setup user, groups and configs
+    addgroup -g 2000 heralding && \
+    adduser -S -H -s /bin/bash -u 2000 -D -g 2000 heralding && \
+    mkdir -p /var/log/heralding/ && \
+
+# Clean up
+    apk del git && \
+    rm -rf /root/* && \
+    rm -rf /var/cache/apk/*
+
+# Start elasticpot
+WORKDIR /opt/heralding/
+CMD ["heralding","-l","/var/log/heralding/heralding.log"]