I have successfully authenticated with docker to my GitLab.com project with a personal access token, and now when I go to push an image, I get a 404 HTTP error:
$ docker push gitlab.com/foo-the-group/foo-project/foo-ci-image:latest
The push refers to repository [gitlab.com/foo-the-group/foo-project/foo-ci-image]
fccd7e88be6d: Preparing
b2803670fcde: Preparing
db14f754ba91: Preparing
9be3c06ba9b1: Preparing
bbff2f76b512: Preparing
66cbf9b5e7d4: Waiting
093501b0a9e2: Waiting
b1169e57b139: Waiting
b3577d595e75: Waiting
3ee270f20d54: Waiting
4ef4adca5c3b: Waiting
error parsing HTTP 404 response body: invalid character '<' looking for beginning of value: "<!DOCTYPE html>\n<html>\n<head>\n <meta content=\"width=device-width, initial-scale=1, maximum-scale=1\" name=\"viewport\">\n <title>The page you're looking for could not be found (404)</title>\n <style>\n body {\n color: #666;\n text-align: center;\n font-family: \"Helvetica Neue\", Helvetica, Arial, sans-serif;\n margin: auto;\n font-size: 14px;\n }\n\n h1 {\n font-size: 56px;\n line-height: 100px;\n font-weight: 400;\n color: #456;\n }\n\n h2 {\n font-size: 24px;\n color: #666;\n line-height: 1.5em;\n }\n\n h3 {\n color: #456;\n font-size: 20px;\n font-weight: 400;\n line-height: 28px;\n }\n\n hr {\n max-width: 800px;\n margin: 18px auto;\n border: 0;\n border-top: 1px solid #EEE;\n border-bottom: 1px solid white;\n }\n\n img {\n max-width: 40vw;\n display: block;\n margin: 40px auto;\n }\n\n a {\n line-height: 100px;\n font-weight: 400;\n color: #4A8BEE;\n font-size: 18px;\n text-decoration: none;\n }\n\n .container {\n margin: auto 20px;\n }\n\n .go-back {\n display: none;\n }\n\n </style>\n</head>\n\n<body>\n <a href=\"/\">\n <img src=\"data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMjEwIiBoZWlnaHQ9IjIxMCIgdmlld0JveD0iMCAwIDIxMCAyMTAiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+CiAgPHBhdGggZD0iTTEwNS4wNjE0IDIwMy42NTVsMzguNjQtMTE4LjkyMWgtNzcuMjhsMzguNjQgMTE4LjkyMXoiIGZpbGw9IiNlMjQzMjkiLz4KICA8cGF0aCBkPSJNMTA1LjA2MTQgMjAzLjY1NDhsLTM4LjY0LTExOC45MjFoLTU0LjE1M2w5Mi43OTMgMTE4LjkyMXoiIGZpbGw9IiNmYzZkMjYiLz4KICA8cGF0aCBkPSJNMTIuMjY4NSA4NC43MzQxbC0xMS43NDIgMzYuMTM5Yy0xLjA3MSAzLjI5Ni4xMDIgNi45MDcgMi45MDYgOC45NDRsMTAxLjYyOSA3My44MzgtOTIuNzkzLTExOC45MjF6IiBmaWxsPSIjZmNhMzI2Ii8+CiAgPHBhdGggZD0iTTEyLjI2ODUgODQuNzM0Mmg1NC4xNTNsLTIzLjI3My03MS42MjVjLTEuMTk3LTMuNjg2LTYuNDExLTMuNjg1LTcuNjA4IDBsLTIzLjI3MiA3MS42MjV6IiBmaWxsPSIjZTI0MzI5Ii8+CiAgPHBhdGggZD0iTTEwNS4wNjE0IDIwMy42NTQ4bDM4LjY0LTExOC45MjFoNTQuMTUzbC05Mi43OTMgMTE4LjkyMXoiIGZpbGw9IiNmYzZkMjYiLz4KICA8cGF0aCBkPSJNMTk3Ljg1NDQgODQuNzM0MWwxMS43NDIgMzYuMTM5YzEuMDcxIDMuMjk2LS4xMDIgNi45MDctMi45MDYgOC45NDRsLTEwMS42MjkgNzMuODM4IDkyLjc5My0xMTguOTIxeiIgZmlsbD0iI2ZjYTMyNiIvPgogIDxwYXRoIGQ9Ik0xOTcuODU0NCA4NC43MzQyaC01NC4xNTNsMjMuMjczLTcxLjYyNWMxLjE5Ny0zLjY4NiA2LjQxMS0zLjY4NSA3LjYwOCAwbDIzLjI3MiA3MS42MjV6IiBmaWxsPSIjZTI0MzI5Ii8+Cjwvc3ZnPgo=\"\n alt=\"GitLab Logo\" />\n </a>\n <h1>\n 404\n </h1>\n <div class=\"container\">\n <h3>The page could not be found or you don't have permission to view it.</h3>\n <hr />\n <p>The resource that you are attempting to access does not exist or you don't have the necessary permissions to view it.</p>\n <p>Make sure the address is correct and that the page hasn't moved.</p>\n <p>Please contact your GitLab administrator if you think this is a mistake.</p>\n <a href=\"javascript:history.back()\" class=\"js-go-back go-back\">Go back</a>\n </div>\n <script>\n (function () {\n var goBack = document.querySelector('.js-go-back');\n\n if (history.length > 1) {\n goBack.style.display = 'inline';\n }\n })();\n </script>\n</body>\n</html>\n"
It appears that docker is interpreting the misinterpreting the image name as a repository path, rather than as <registry URL>/<namespace>/<project>/<image> (see GitLab Container Registry). My docker version is version 20.10.7, build f0df350. Am I invoking docker push incorrectly, or not have my GitLab project set up correctly, or… what?