fixed docker issues (#16)

Fixing Docker issues

build/Dockerfile

@@ -0,0 +1,31 @@
+FROM alpine:latest AS build
+# use given repository, default below:
+ARG repo=https://github.com/orangecoding/fredy.git
+
+RUN mkdir -p /usr/src/
+#Install Software
+RUN apk add --update nodejs npm git
+
+# Output used repository
+RUN echo "Cloning from $repo"
+
+RUN cd /usr/src && git clone $repo
+
+RUN ln -s /usr/src/fredy/conf/ /conf
+
+# create db folder
+RUN mkdir /usr/src/fredy/db/
+
+RUN ln -s /usr/src/fredy/db/ /db
+
+RUN cd /usr/src/fredy/ && npm install 
+
+WORKDIR  /usr/src/fredy
+
+RUN npm run prod
+
+EXPOSE 9998
+
+VOLUME [ "/conf", "/db" ]
+# --no-daemon is required for keeping Container alive
+CMD node index.js --no-daemon