Add web SVG generator, container, and Kubernetes manifests

- Flask app (web/) generates M1730 scale SVGs from a form; embeds
  GOST typ A font as base64 so output is self-contained
- Dockerfile builds the app into git.baumann.gr/adebaumann/m1730-generator
- k8s/ deploys as a ClusterIP service for NPM to proxy at
  works.adebaumann.com/M1730-generator/

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CLAUDE.md

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+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+SVG scale artwork for M1730 analog meters. The scales are designed in Inkscape (v1.4.3) using the **ГОСТ тип А** (GOST type A) font, a Russian technical drafting standard typeface.
+
+All canvas dimensions are **157.18373 mm × 26.683672 mm**. The coordinate origin is offset: `transform="translate(-37.352226,-90.454928)"` is applied to `layer1` in all files, so absolute SVG coordinates start around x=37, y=90 rather than 0,0.
+
+## File Roles
+
+The three SVG files represent layers of the same design, intended to be combined or used separately:
+
+- **`M1730-Scale_template.svg`** — Inkscape working template. Contains the background rect+cutout path, the zero tick mark, an end tick mark, the "U" axis label, numeric labels `0` and `X` (placeholder for the full-scale value), and a `5mA` range label. Also contains a `<rect id="rect5">` inside `<defs>` used as a text flow shape (`shape-inside:url(#rect5)`) for the title text block (`id="text5"`).
+- **`M1730-Scale_paths.svg`** — Paths-only version: all tick marks as `<path>` elements, no text nodes (or text converted to paths). Used for cutting/printing workflows where fonts must not be embedded as live text.
+- **`M1730-Scale_text.svg`** — Text-overlay version: tick mark paths plus live `<text>` elements for numeric labels. The `sodipodi:docname` is `M1730-Scale.svg`, suggesting this is the "final" named file.
+
+## Key Design Parameters
+
+- Stroke colors: `#1a1a1a` (dark near-black) for all scale lines and text; fill `#f9f9f9` for the background panel, `#ffffff` for tick mark strokes.
+- Major tick stroke-width: `0.555`; border stroke-width: `0.184`.
+- Scale bar (the colored strip below tick marks): `y` range 107.547–113.746 mm absolute, `x` range 58.444–183.644.
+- Zero tick at absolute x=60.844; full-scale tick at x=180.251.
+
+## Web Generator (`web/`)
+
+A Flask app that generates scale SVGs from a form. The venv lives at the repo root.
+
+```
+source .venv/bin/activate
+cd web && python app.py        # runs on http://localhost:5000
+```
+
+`app.py` has one route (`GET /`) serving the form and one (`POST /generate`) that returns SVG. All SVG geometry is computed in `generate_svg()` using the same coordinate constants as the hand-drawn files. The form exposes: unit label, min/max values, major tick intervals, minor ticks per interval, number of numeric labels, and range label.
+
+The ГОСТ тип А font is loaded at startup from `/usr/local/share/fonts/г/ГОСТ_тип_А.ttf` and embedded as base64 in every generated SVG so output files are self-contained.
+
+## Container & Kubernetes
+
+```
+docker build -t m1730-scale:latest .
+```
+
+`fonts/ГОСТ_тип_А.ttf` must exist in the repo root before building (copy from `/usr/local/share/fonts/г/`). The image runs gunicorn on port 5000.
+
+```
+kubectl apply -f k8s/
+```
+
+NPM should proxy `https://works.adebaumann.com/M1730-generator/` → `http://m1730-generator/` **with the prefix stripped** (trailing slash on `proxy_pass`). The frontend uses a relative `fetch('generate', ...)` URL so it works correctly under any subpath.
+
+## Editing SVG files directly
+
+Open files in **Inkscape**. There is no build, lint, or test tooling — changes are made directly to the SVG XML or via Inkscape's GUI. When modifying tick positions or labels, keep all three files consistent.