Improve build and scripts (#30)

* Use absolute path rather than relative path in scripts

* Remove src/bitBetter/.keys/cert.cert

* Build licenseGen in Docker
This way we don't have to install dotnet sdk on the host

* Build bitBetter in Docker
This way we don't have to install dotnet sdk on the host

* Change DIR in run.sh to point to the project root

* Replace echo in Dockerfiles by set -x and set -e

* Use same Dockerfile for api and identity images

* Update README.md

* Update CircleCI config
The Docker Executor can't mount volume.
https://support.circleci.com/hc/en-us/articles/360007324514
https://circleci.com/docs/2.0/executor-types/#using-machine

* Make scripts work with sh

* Remove the container used to build bitBetter

src/bitBetter/Dockerfile

@@ -0,0 +1,11 @@
+ARG BITWARDEN_TAG
+FROM ${BITWARDEN_TAG}
+
+COPY bin/Debug/netcoreapp2.0/publish/* /bitBetter/
+COPY ./.keys/cert.cert /newLicensing.cer
+
+RUN set -e; set -x; \
+    dotnet /bitBetter/bitBetter.dll && \
+    mv /app/Core.dll /app/Core.orig.dll && \
+    mv /app/modified.dll /app/Core.dll && \
+    rm -rf /bitBetter && rm -rf /newLicensing.cer