FROM ubuntu:latest

RUN apt update && apt install python3 -y && apt install python3-pip -y

COPY . /app
WORKDIR /app

RUN pip3 install -r requirements.txt

EXPOSE 5000

ENTRYPOINT  ["bash"]
CMD ["start.sh"]

Building webservice
ERROR: Couldn't connect to Docker daemon at http+docker://localhost - is it running?

If it's at a non-standard location, specify the URL with the DOCKER_HOST environment variable.

total 20K
drwxr-xr-x  4 ctf  ctf  4.0K Mar 11 02:12 .
drwxrwxrwt 16 root root 4.0K Mar 11 02:11 ..
drwxr-xr-x  2 ctf  ctf  4.0K Mar 11 02:09 conf
-rw-r--r--  1 ctf  ctf   534 Mar 11 02:11 docker-compose.yml
drwxr-xr-x  6 ctf  ctf  4.0K Mar 11 02:13 _webs

version: "3"
services:

        nginx:
                container_name: nginx
                image: nginx:latest
                ports:
                        - "80:80"
                        - "443:443"
                volumes:
                        - ./conf/nginx.conf:/etc/nginx/nginx.conf

        webservice:
                image: webs
                container_name: webservice
                ports:
                        - "5000:5000"