fix: add missing build dependencies for cryptography (#50)

.drone.jsonnet

@@ -186,9 +186,11 @@ local PipelineBuildContainer(arch='amd64') = {
   steps: [
     {
       name: 'build',
-      image: 'python:3.9',
+      image: 'python:3.9-alpine',
       commands: [
+        'apk --update --quiet add build-base libffi-dev musl-dev libressl-dev python3-dev cargo git',
         'git fetch -tq',
+        'pip install --upgrade --no-cache-dir pip',
         'pip install poetry poetry-dynamic-versioning -qq',
         'poetry build',
       ],
@@ -262,7 +264,7 @@ local PipelineDocs = {
   },
   steps: [
     {
-      name: 'generate',
+      name: 'assets',
       image: 'thegeeklab/alpine-tools',
       commands: [
         'make doc',

.drone.yml

@@ -202,9 +202,11 @@ platform:
 
 steps:
 - name: build
-  image: python:3.9
+  image: python:3.9-alpine
   commands:
+  - apk --update --quiet add build-base libffi-dev musl-dev libressl-dev python3-dev cargo git
   - git fetch -tq
+  - pip install --upgrade --no-cache-dir pip
   - pip install poetry poetry-dynamic-versioning -qq
   - poetry build
 
@@ -280,9 +282,11 @@ platform:
 
 steps:
 - name: build
-  image: python:3.9
+  image: python:3.9-alpine
   commands:
+  - apk --update --quiet add build-base libffi-dev musl-dev libressl-dev python3-dev cargo git
   - git fetch -tq
+  - pip install --upgrade --no-cache-dir pip
   - pip install poetry poetry-dynamic-versioning -qq
   - poetry build
 
@@ -358,9 +362,11 @@ platform:
 
 steps:
 - name: build
-  image: python:3.9
+  image: python:3.9-alpine
   commands:
+  - apk --update --quiet add build-base libffi-dev musl-dev libressl-dev python3-dev cargo git
   - git fetch -tq
+  - pip install --upgrade --no-cache-dir pip
   - pip install poetry poetry-dynamic-versioning -qq
   - poetry build
 
@@ -438,7 +444,7 @@ concurrency:
   limit: 1
 
 steps:
-- name: generate
+- name: assets
   image: thegeeklab/alpine-tools
   commands:
   - make doc
@@ -608,6 +614,6 @@ depends_on:
 
 ---
 kind: signature
-hmac: 7ad723e57aed9e6cb0f90cf5d79b3413b387988e7e0675078b3775bb2e22c966
+hmac: e2af01a304ae27706efb6d23d3fd0c3adfe4e590e627fb9f22bd978c9e742b18
 
 ...