[Feature] Path prefixes (#369)

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#369

Dockerfile

@@ -71,6 +71,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     libxrender1 \
     libxext6 \
     libfontconfig1 \
+    nano \
     && rm -rf /var/lib/apt/lists/*
 
 RUN useradd -ms /bin/bash django