clean doc folder before building, fixes #4405 (#4406)

docs/build.sh

@@ -15,5 +15,6 @@ for script in scripts/*.py ; do
   "${script}" > "${output}"
 done
 
+rm -rf ./public
 cd src
 hugo

docs/ci.sh

@@ -11,7 +11,7 @@ set -o pipefail
 # Only upload if we have defined credentials - we only have these defined for
 # trusted commits (i.e. not PRs).
 if [[ ! -z "${AWS_ACCESS_KEY_ID}" && $GITHUB_REF == "refs/heads/master" ]]; then
-    aws s3 sync --acl public-read ./public s3://docs.mitmproxy.org/master
+    aws s3 sync --delete --acl public-read ./public s3://docs.mitmproxy.org/master
     aws cloudfront create-invalidation --distribution-id E1TH3USJHFQZ5Q \
         --paths "/master/*"
 fi

docs/upload-stable.sh

@@ -7,7 +7,7 @@ set -o nounset
 
 aws configure set preview.cloudfront true
 aws --profile mitmproxy \
-    s3 sync --acl public-read ./public s3://docs.mitmproxy.org/stable
+    s3 sync --delete --acl public-read ./public s3://docs.mitmproxy.org/stable
 aws --profile mitmproxy \
     cloudfront create-invalidation --distribution-id E1TH3USJHFQZ5Q \
     --paths "/stable/*"