Merge branch 'current' into next

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:slim
+FROM python:3.8-slim
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         curl \
@@ -9,8 +9,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
         software-properties-common \
         && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/*
 
-RUN pip3 install --no-cache-dir --no-binary :all: \
-        sphinx
+COPY requirements.txt .
+RUN pip3 install --no-cache-dir --no-binary :all: -r requirements.txt
 
 EXPOSE 8000
 WORKDIR /data/esphomedocs

guides/getting_started_command_line.rst

@@ -16,6 +16,11 @@ Installing ESPHome is very easy. All you need to do is have `Python
 <https://www.python.org/>`__ installed and install the console script through
 ``pip3``.
 
+.. note::
+
+    Python 3.7 or above is required to install ESPHome 1.18.0 or above.
+    
+
 .. code-block:: bash
 
     pip3 install esphome

requirements.txt

@@ -1 +1 @@
-sphinx>=1.8.4
+sphinx==4.0.3