Update deprecated function.

Containerfile

@@ -1,4 +1,4 @@
-FROM rust:1.64 as builder
+FROM rust:1.70 as builder
 
 # Create a new empty project.
 RUN USER=root cargo new --bin tildes-statistics
@@ -18,7 +18,7 @@ COPY node_modules/modern-normalize node_modules/modern-normalize
 RUN rm target/release/deps/tildes_statistics*
 
 # Build the executable with actual source code.
-RUN cargo install --offline --path .
+RUN cargo install --locked --offline --path .
 
 # Copy the executable to a smaller final image.
 FROM debian:bullseye-slim

source/charts/mod.rs

@@ -60,7 +60,7 @@ impl UserCountChart {
 
     let chart_root = chart_root
       .margin(20, 20, 20, 20)
-      .titled("Tildes User Count", text_style(30))?;
+      .titled("User Count", text_style(30))?;
 
     chart_root.fill(&BACKGROUND_2)?;
 

source/utilities.rs

@@ -65,5 +65,5 @@ pub fn get_env_var(key: &str) -> Result<String> {
 
 /// Create a [`NaiveDate`] for today.
 pub fn today() -> NaiveDate {
-  Utc::now().date().naive_utc()
+  Utc::now().date_naive()
 }