Merge branch 'dockerfile_add_git' into 'master'

Add git to the Docker image.Update Dockerfile

See merge request postgres-ai/postgres-checkup!318

Author: dmius

Dockerfile

@@ -11,6 +11,7 @@ RUN apk add --update --no-cache \
     gawk \
     sed \
     make \
-    build-base
+    build-base \
+    git
 
 COPY . .

README.md

@@ -117,10 +117,7 @@ should work as well, but are not yet tested).
 Ubuntu/Debian:
 ```
 sudo apt-get update
-sudo apt-get install postgresql
-sudo apt-get install coreutils
-sudo apt-get install jq
-sudo apt-get install golang
+sudo apt-get install git postgresql coreutils jq golang
 # Optional (if you need PDF/HTML)
 # Pandoc (needed for both HTML and PDF generation)
 sudo apt install pandoc
@@ -131,12 +128,13 @@ sudo mv wkhtmltox/bin/wkhtmlto* /usr/local/bin
 sudo apt-get install -y openssl libssl-dev libxrender-dev libx11-dev libxext-dev libfontconfig1-dev libfreetype6-dev fontconfig
 ```
 
-MacOS (assuming that Homebrew is installed):
+MacOS (assuming that [Homebrew](https://brew.sh/) is installed):
 ```
 brew install postgresql
 brew install coreutils
 brew install jq
 brew install golang
+brew install git
 # Optional
 brew install pandoc
 brew install Caskroom/cask/wkhtmltopdf