Resolve "Add Automated Secrets Detection"

Closes #6 (closed)

detect-secrets/Dockerfile

+FROM python:3.7-alpine
+
+ARG BUILD_DATE
+ARG VCS_REF
+ARG VERSION
+LABEL org.label-schema.build-date=$BUILD_DATE \
+      org.label-schema.name="Detects secrets" \
+      org.label-schema.description="Docker image to detect secrets in a code base" \
+      org.label-schema.vcs-ref=$VCS_REF \
+      org.label-schema.vendor="University of Nebraska - Lincoln" \
+      org.label-schema.version="0.1.0" \
+      org.label-schema.schema-version="1.0" \
+      maintainer="J.R. Barreras <barreras@unl.edu>"
+
+WORKDIR /work
+
+RUN apk update && apk upgrade && \
+    apk add --no-cache git && \
+	pip install detect-secrets
+
+COPY entrypoint.sh /usr/local/bin/
+RUN chmod +x /usr/local/bin/entrypoint.sh
+#ENTRYPOINT ["/usr/local/bin/detect-secrets"]
+ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
+
+CMD ["/usr/local/bin/detect-secrets", "scan"]