diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 00000000000..4dcc4dd58df
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,5 @@
+.git
+.github
+docs
+node_modules
+src
diff --git a/Dockerfile b/Dockerfile
index 935181ce2a2..255d4877f04 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,7 +18,7 @@
 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 # IN THE SOFTWARE.
 
-FROM python:3.6.8-alpine3.9
+FROM python:3.8.1-alpine3.11
 
 # Set build directory
 WORKDIR /tmp
@@ -38,7 +38,10 @@ RUN \
     git-fast-import \
     openssh \
   && python setup.py install \
-  && rm -rf /tmp/*
+  && rm -rf /tmp/* \
+  && pip install --no-cache-dir \
+    'mkdocs-minify-plugin>=0.2' \
+    'mkdocs-git-revision-date-localized-plugin'
 
 # Set working directory
 WORKDIR /docs
diff --git a/requirements.txt b/requirements.txt
index 2f65eada6c7..274d6578db8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,6 @@
 
 # Direct dependencies
 mkdocs>=1.0
-mkdocs-minify-plugin>=0.2
 Pygments>=2.4
 markdown>=3.2
 pymdown-extensions>=6.3