diff --git a/.github/workflows/linting.yml b/.github/workflows/linting.yml
index 35994b9a..f7a45388 100644
--- a/.github/workflows/linting.yml
+++ b/.github/workflows/linting.yml
@@ -36,4 +36,4 @@ jobs:
       - name: Run Hadolint
         uses: jbergstroem/hadolint-gh-action@v1
         with:
-          dockerfile: "**/Dockerfile*"
+          dockerfile: "Dockerfile*"
diff --git a/.hadolint.yaml b/.hadolint.yaml
new file mode 100644
index 00000000..49c344e7
--- /dev/null
+++ b/.hadolint.yaml
@@ -0,0 +1,2 @@
+ignored:
+  - DL3013
diff --git a/Dockerfile.server b/Dockerfile.server
index 03dac571..baa3b27b 100644
--- a/Dockerfile.server
+++ b/Dockerfile.server
@@ -1,13 +1,13 @@
-FROM python:3.8.12
+FROM docker.io/python:3.8.12
 
 # need this for the Dash app
 EXPOSE 8050
 
 # install pipenv
-RUN pip install pipenv
+RUN pip --no-cache-dir install pipenv
 
 # create a working directory
-RUN mkdir explorer
+# RUN mkdir explorer
 
 # set that directory as working dir
 WORKDIR /explorer
@@ -27,5 +27,4 @@ COPY ./ /explorer/
 # Description of how to choose the number of workers and threads.
 # common wisdom is (2*CPU)+1 workers: 
 # https://medium.com/building-the-system/gunicorn-3-means-of-concurrency-efbb547674b7
-CMD gunicorn --bind :8050 app:server --workers 8 --threads 4
-
+CMD [ "gunicorn", "--bind", ":8050", "app:server", "--workers", "8", "--threads", "4" ]
diff --git a/Dockerfile.supervisor_workers b/Dockerfile.supervisor_workers
index b40277ed..b892d5dd 100644
--- a/Dockerfile.supervisor_workers
+++ b/Dockerfile.supervisor_workers
@@ -1,16 +1,13 @@
-FROM python:3.8.12
+FROM docker.io/python:3.8.12
 
 # need this for the Dash app
 EXPOSE 8050
 
-# install pipenv
-RUN pip install pipenv
-
-# install supervisor
-RUN pip install supervisor 
+# install pipenv supervisor
+RUN pip --no-cache-dir install pipenv supervisor
 
 # copy config
-ADD supervisord.conf /etc/supervisor/conf.d/supervisord.conf
+COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf
 
 # create a working directory
 RUN mkdir explorer
@@ -30,4 +27,4 @@ RUN pipenv install --system --deploy
 COPY ./ /explorer/
 
 # run supervisord
-CMD supervisord
+CMD [ "supervisord" ]
diff --git a/Dockerfile.worker b/Dockerfile.worker
index c3066558..328db707 100644
--- a/Dockerfile.worker
+++ b/Dockerfile.worker
@@ -1,13 +1,13 @@
-FROM python:3.8.12
+FROM docker.io/python:3.8.12
 
 # need this for the Dash app
 EXPOSE 8050
 
 # install pipenv
-RUN pip install pipenv
+RUN pip --no-cache-dir install pipenv
 
 # create a working directory
-RUN mkdir explorer
+# RUN mkdir explorer
 
 # set that directory as working dir
 WORKDIR /explorer
@@ -24,4 +24,4 @@ RUN pipenv install --system --deploy
 COPY ./ /explorer/
 
 # run worker
-CMD rq worker -c worker_settings
+CMD [ "rq", "worker", "-c", "worker_settings" ]
diff --git a/scripts/launch_dev.sh b/scripts/launch_dev.sh
old mode 100644
new mode 100755
index 1020d079..4c7b29b7
--- a/scripts/launch_dev.sh
+++ b/scripts/launch_dev.sh
@@ -1,3 +1,5 @@
+#!/bin/sh
+
 # It's common to have access permission denied by the Docker Daemon
 # on Linux machines if you don't run Docker with root permissions.