Update dockerfiles to run as non-root

docker/Dockerfile.custom

@@ -1,7 +1,7 @@
 FROM freqtradeorg/freqtrade:develop
 
-RUN apt-get update \
-    && apt-get -y install git \
-    && apt-get clean \
+RUN sudo apt-get update \
+    && sudo apt-get -y install git \
+    && sudo apt-get clean \
     # The below dependency - pyti - serves as an example. Please use whatever you need!
-    && pip install pyti
+    && pip install --user pyti

docker/Dockerfile.develop

@@ -3,8 +3,8 @@ FROM freqtradeorg/freqtrade:develop
 # Install dependencies
 COPY requirements-dev.txt /freqtrade/
 
-RUN pip install numpy --no-cache-dir \
-  && pip install -r requirements-dev.txt --no-cache-dir
+RUN pip install numpy --user --no-cache-dir \
+  && pip install -r requirements-dev.txt --user --no-cache-dir
 
 # Empty the ENTRYPOINT to allow all commands
 ENTRYPOINT []

docker/Dockerfile.jupyter

@@ -1,7 +1,7 @@
 FROM freqtradeorg/freqtrade:develop_plot
 
 
-RUN pip install jupyterlab --no-cache-dir
+RUN pip install jupyterlab --user --no-cache-dir
 
 # Empty the ENTRYPOINT to allow all commands
 ENTRYPOINT []

docker/Dockerfile.plot

@@ -4,4 +4,4 @@ FROM freqtradeorg/freqtrade:${sourceimage}
 # Install dependencies
 COPY requirements-plot.txt /freqtrade/
 
-RUN pip install -r requirements-plot.txt --no-cache-dir
+RUN pip install -r requirements-plot.txt --user --no-cache-dir