Dockerization and generalization of the project. Make it accessable for everyone

Dockerfile

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+FROM rustlang/rust:nightly
+
+EXPOSE 8000
+
+ENV ROOT_PATH=/root/crablog/content
+ENV DATABASE_URL=${ROOT_PATH}/db.sqlite3
+
+RUN mkdir -p /root/crablog
+
+COPY ./site /root/crablog
+
+# set up database
+WORKDIR /root/crablog
+
+# install crablog
+RUN cargo install --path . --root /
+
+CMD ["crablog"]