Docker volume for ssh key

[rjocoleman]

@geerlingguy is the docker volume required for ~/.ssh/id_ed25519.

I don't have ssh keys there as they're all coming in via an ssh-agent, so the docker compose will fail to bring it up.

looks like the suggested docker attach openwrt-build obviates the need for this and it could be removed?

Else, what about a default password (shudder), not ideal but it's it's only used for the builder on a local machine not so high hazard? e.g.

diff --git a/Dockerfile b/Dockerfile
index 4717b64..ba9d11d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,6 +13,7 @@ RUN chmod 644 /root/.ssh

 # Add build user.
 RUN useradd -ms /bin/bash build
+RUN echo 'build:build' | chpasswd

 # Create build directory.
 RUN mkdir /build && chown build:build /build
diff --git a/docker-compose.yml b/docker-compose.yml
index 456cc75..41d2465 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -13,8 +13,6 @@ services:
     volumes:
       - linux:/build
       - ./images:/images
-      # Mount local user's SSH key into container.
-      - ~/.ssh/id_ed25519:/root/.ssh/id_ed25519:ro

 volumes:
   linux:

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