Adds Dockerfile for building a local development image

Add image builder documentation

Fix list item indent

Fix codacy issues

Make alpine version explicit

Fix markup indents

Fix image tag

Remove list items from markdown

Dockerfile

@@ -0,0 +1,32 @@
+FROM golang:alpine as build
+
+COPY ./ /ocis/
+ENV CGO_ENABLED=0
+ENV GOOS=linux
+
+RUN apk update && \
+	apk upgrade && \
+	apk add make gcc bash && \
+	rm -rf /var/cache/apk/*
+
+WORKDIR /ocis/ocis
+RUN make clean generate build
+
+
+FROM amd64/alpine:3
+
+RUN apk update && \
+	apk upgrade && \
+	apk add ca-certificates mailcap && \
+	rm -rf /var/cache/apk/* && \
+	echo 'hosts: files dns' >| /etc/nsswitch.conf
+
+LABEL maintainer="ownCloud GmbH <devops@owncloud.com>" \
+  org.label-schema.name="ownCloud Infinite Scale" \
+  org.label-schema.vendor="ownCloud GmbH" \
+  org.label-schema.schema-version="1.0"
+
+ENTRYPOINT ["/usr/bin/ocis"]
+CMD ["server"]
+
+COPY --from=build /ocis/ocis/bin/ocis /usr/bin/ocis