Workaround for fixing UTF8 issues

Problem related to UnicodeDecodeError : ascii codec can't decode byte.
Solved by adding a few docker lines the lines above.

https://stackoverflow.com/questions/47013840/docker-compose-up-giving-error-unicodedecodeerror-ascii-codec-cant-decode-by

Dockerfile

@@ -1,9 +1,25 @@
 FROM ubuntu
 
-RUN apt-get update && \
-    apt-get install -y git python3-pip python3.6 && \
-    apt-get install -y openslide-tools
+RUN apt-get update \
+    && apt-get install -y git python3-pip python3.6 \
+    && apt-get install -y openslide-tools
+
+# uncomment:
+    # 1 - this additional RUN only if you are facing issues with UTF8 when running your container
+    # 2 - all ENV variables in comment
+
+    #RUN apt-get update -y \
+    #    && apt-get install --reinstall -y locales \
+    #    # uncomment chosen locale to enable it's generation
+    #    && sed -i 's/# pl_PL.UTF-8 UTF-8/pl_PL.UTF-8 UTF-8/' /etc/locale.gen \
+    #    # generate chosen locale
+    #    && locale-gen pl_PL.UTF-8
+
+    ## set system-wide locale settings 
+    #ENV LANG pl_PL.UTF-8
+    #ENV LANGUAGE pl_PL
+    #ENV LC_ALL pl_PL.UTF-8
 
 RUN cd /opt \
-    git clone https://github.com/choosehappy/HistoQC.git \
-    pip3 install -r /opt/HistoQC/requirements.txt
+    && git clone https://github.com/choosehappy/HistoQC.git \
+    && pip3 install -r /opt/HistoQC/requirements.txt