Дмитрий

FROM ubuntu:latest

RUN apt update && apt install -y openssl

RUN mkdir -p /etc/cert

RUN /bin/bash -c "openssl req -x509 \
    -newkey rsa:2048 -nodes -sha256 \
    -out /etc/cert/localhost.crt  \
    -keyout /etc/cert/localhost.key \
    -subj '/CN=localhost' \
    -extensions EXT \
    -config <( \
      printf '[dn]\nCN=localhost\n[req]\ndistinguished_name = dn\n[EXT]\nsubjectAltName=DNS:localhost\nkeyUsage=digitalSignature\nextendedKeyUsage=serverAuth')"

docker build .

Sending build context to Docker daemon  2.048kB
Step 1/4 : FROM ubuntu:latest
 ---> 1318b700e415
Step 2/4 : RUN apt update && apt install -y openssl
 ---> Using cache
 ---> e608bba6cb59
Step 3/4 : RUN mkdir -p /etc/cert
 ---> Using cache
 ---> b89d4c7495a3
Step 4/4 : RUN /bin/bash -c "openssl req -x509     -newkey rsa:2048 -nodes -sha256     -out /etc/cert/localhost.crt      -keyout /etc/cert/localhost.key     -subj '/CN=localhost'     -extensions EXT     -config <(       printf '[dn]\nCN=localhost\n[req]\ndistinguished_name = dn\n[EXT]\nsubjectAltName=DNS:localhost\nkeyUsage=digitalSignature\nextendedKeyUsage=serverAuth')"
 ---> Running in a4012f6c4893
Generating a RSA private key
................................................+++++
..+++++
writing new private key to '/etc/cert/localhost.key'
-----
Removing intermediate container a4012f6c4893
 ---> 6ea49c8d9ada
Successfully built 6ea49c8d9ada