Step 1/20 : FROM ubuntu:18.04
 ---> 20bb25d32758
Step 2/20 : MAINTAINER Raj <raj@fake.email>
 ---> Using cache
 ---> e7dd6c6a3ce3
Step 3/20 : ENV LC_ALL=en_US.utf-8
 ---> Using cache
 ---> 5bb19b82e6e7
Step 4/20 : ENV LANG=en_US.utf-8
 ---> Using cache
 ---> 7c1fa682e55d
Step 5/20 : ENV VENV=/app
 ---> Using cache
 ---> 21b154568be6
Step 6/20 : ENV PYTHONUNBUFFERED 1
 ---> Using cache
 ---> 2df88624f749
Step 7/20 : RUN locale -a
 ---> Running in b0dc16319cb8
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_COLLATE to default locale: No such file or directory
C
C.UTF-8
POSIX