Here I have built the bash script to install airflow using docker on your system without any hustle, just follow below 3 commands:
STEP 01 - cd <REPO_DIR> # getting into the repository directory
STEP 02 - chmod +x airflow-docker-setup.sh # making bash script executable
STEP 03 - ./airflow-docker-setup.sh # execute the script
Hit http://localhost:8080/ to get airflow login page.
BAM!
In case you face error while running the bash script, just open the airflow-docker-setup.sh and I have mentioned few errors in comments with there solution links.