chore(deps): pin dependencies (#8)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| alpine | final | pinDigest |  -> `9f867dc` |
| hadolint/hadolint |  | pinDigest |  -> `9cef74a` |
| koalaman/shellcheck-alpine |  | pinDigest |  -> `f73b035` |
| plugins/docker |  | pinDigest |  -> `2f15740` |
| zricethezav/gitleaks |  | pinDigest |  -> `6945c62` |

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Reviewed-on: #8
Co-authored-by: Renovate Bot <renovate@mgrote.net>
Co-committed-by: Renovate Bot <renovate@mgrote.net>

.woodpecker/build.yml

@@ -3,7 +3,7 @@ depends_on:
   - lint
 steps:
   selfhosted_tag:
-    image: plugins/docker
+    image: plugins/docker@sha256:2f157400c2cb7de1b309b0f044f119375108218e54d38e1340e00b9f93abdefb
     settings:
       dockerfile: Dockerfile
       repo: registry.mgrote.net/python-api-server
@@ -15,7 +15,7 @@ steps:
         - tag
 
   selfhosted_push:
-    image: plugins/docker
+    image: plugins/docker@sha256:2f157400c2cb7de1b309b0f044f119375108218e54d38e1340e00b9f93abdefb
     settings:
       dockerfile: Dockerfile
       repo: registry.mgrote.net/python-api-server

.woodpecker/lint.yml

@@ -1,7 +1,7 @@
 ---
 steps:
   gitleaks:
-    image: zricethezav/gitleaks:latest
+    image: zricethezav/gitleaks:latest@sha256:6945c62ca019ead32bc337ab0c9fd055e98d82961765d38b7ccccc84dae95d0f
     commands:
       - gitleaks detect --no-git --verbose --source $CI_WORKSPACE
     when:
@@ -10,7 +10,7 @@ steps:
           - tag
 
   hadolint:
-    image: hadolint/hadolint:latest-debian
+    image: hadolint/hadolint:latest-debian@sha256:9cef74a390694cdc01dd119cbba9adac5bb6671ce67d8d79eb7ec68f497a3684
     commands:
       - hadolint Dockerfile
     when:
@@ -19,7 +19,7 @@ steps:
           - tag
 
   shellcheck:
-    image: koalaman/shellcheck-alpine:stable
+    image: koalaman/shellcheck-alpine:stable@sha256:f73b035c8ebfc8a66ba54e07af5cc41e790cf41fff45317914b1ce677dd9cada
     commands:
       - "find . -name *.sh -exec shellcheck {} +"
     when:

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:20231219
+FROM alpine:20231219@sha256:9f867dc20de5aa9690c5ef6c2c81ce35a918c0007f6eac27df90d3166eaa5cc0
 
 # hadolint ignore=DL3018
 RUN apk add --no-cache \